#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main() {
	int a, b;
	cin >> a >> b;

	int t = max(a, max(b, 180 - a - b));
	if (t > 90)
		cout << "钝角三角形";
	else if (t == 90)
		cout << "直角三角形";
	else
		cout << "锐角三角形";
	return 0;
}
